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    <title>Document</title>
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    <script>
        function runAsync(x) {
            const p = new Promise(r =>
                setTimeout(() => r(x, console.log(x)), 1000)
            );
            return p;
        }
        function runReject(x) {
            const p = new Promise((res, rej) =>
                setTimeout(() => rej(`Error: ${x}`, console.log(x)), 1000 * x)
            );
            return p;
        }
        Promise.race([runReject(0), runAsync(1), runAsync(2), runAsync(3)])
            .then(res => console.log("result: ", res))
            .catch(err => console.log(err));
        // 输出0 Error: 0 1 2 3
    </script>
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